Couplings

Pneumatic connection technology

Festo couplings allow tool-free disconnection and reconnection of compressed air lines without depressurising the installation. The range includes coupling sockets in series KD1 (M3), KD2 (M5/CK) and KD3/KD4 (1/8" to 1/2" BSP and CK push-in), plus push-in socket KDV-PK for coupling directly to standard tubing. Internal thread (-I) and external thread (-A) variants give flexible mounting options.

Compressed air quick-coupling - tool-free push and pull without system depressurisation
Thread sizes M3 to 1/2" BSP - series KD1 (M3), KD2 (M5, CK3, CK4), KD3/KD4 (1/8"-1/2")
External (-A) and internal (-I) thread - fits into threaded bores or onto male studs
CK push-in connections (KD3-CK-4, KD3-CK-6) - coupling for CK-normalised mating parts
Push-in sockets KDV-PK-2, -3, -4 - push-in coupling for PK tube connections directly on the line

SeriesThread / push-in sizeVersion
KD1-M3-AM3External thread
KD2-M5-A, KD2-M5-IM5External and internal thread
KD2-CK-3, KD2-CK-4CK3, CK4CK push-in connection
KD3-1/8-A, KD3-1/8-A-R, KD3-1/8-IG1/8External, internal, check-valve
KD3-1/4-A, KD3-1/4-IG1/4External and internal thread
KD4-1/4-A, KD4-3/8-A, KD4-1/2-AG1/4, G3/8, G1/2External thread
KD4-CK-6, KD4-CK-9, KD4-N-9CK6, CK9, N9CK and N push-in
KDV-PK-2, -PK-3, -PK-4PK2, PK3, PK4Push-in socket

Typical applications: Tool changes on handling devices and robots, isolation points for maintenance zones (individual decommissioning without full system depressurisation), rapidly interchangeable test and inspection fixtures, and mobile compressed air consumers with quick-coupling connection to the supply line.

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  1. Coupling Socket KD4-1/4-A - Festo 2143
    €12.71
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